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login and registration system in c++

P.V.S. Adithya answered on March 3, 2023 Popularity 5/10 Helpfulness 7/10

answer login and registration system in c++

login and registration system in c++

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#include <iostream>
#include <fstream> //because here we are going to use file handling
#include <cstring>
using namespace std;

//this below is for verifying are you create an account or not
//so here we use bool value that always returns true or false
//if you have account this means true and else false

//verify logged in or not

bool IsloggedIn()
{
    string username, password, un, pw; //last two are comparison string

    cout << "Enter username :";
    cin >> username;

    cout << "Enter password :";
    cin >> password;

    //for reading file that you have account or not
    //if stream for reading the file
    //read is variable here
    ifstream read("data\\" + username + ".txt"); //here data.txt where our data will save for us 
    //the file name is written in double cout in file handling
    getline(read, un); //for reading the user name is that user valid
    getline(read, pw); //reading the password correct or not

    //comparison

    if (un == username && pw == password)
    {
        return true;   //that the user is valid and can log in
    }
    else
    {
        return false;
    }
}

int main()
{
   // system("colour 3f"); for colour output in console
    int choice;

    cout << "1 : Register \n2 :Login\nYour choice :";
    cin >> choice;
    if (choice == 1)
    {
        string username, password;

        cout << "select a username :";
        cin >> username;
        cout << "select a password :";
        cin >> password;

        //

        ofstream file;
        //open file help of open function
        file.open("data\\" + username + ".txt");

  //rewrite in the file
        file<<"username :"<<username<<endl<<"password :"<<password; //the data is registered into our file
        file.close();

    //return here main because then again we going to logged in
    //then we go ahead and register another one so:
    main();
    }

//if user have already account and want to log in then
    else if(choice==2)
    {
        //create a variable status and assign into islogged in function 
        //and it proceed it from there
       bool status =IsloggedIn();

       if(!status) //if login goes wrong user name and password is incorrect
       {
          cout<<"Invalid user name password :"<<endl;
          system("PAUSE");

//This is a Windows-specific command, which tells the OS to run the pause
// program. This program waits to be terminated, and halts the execution of the parent C++ program. 
          return 0;
       }
       else //if success then return 1 or proceed further
       {
           cout<<"Successfully Logged in"<<endl;
           system("pause");
           return 1;
       }
    }
}

Popularity 5/10 Helpfulness 7/10 Language cpp

Source: Grepper

Tags: c++ registration system

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Contributed on Mar 03 2023

P.V.S. Adithya

0 Answers Avg Quality 2/10

login and registration system in c++

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